doc: update readme dependencies and installation sections

[arad-starkware]

This change is 

---

Note

Updates README to simplify dependencies and installation, switching to Scarb-based build instructions and optional Starknet Foundry.

• Docs (README):
  • Dependencies: Replace Turbo/pnpm stack with explicit tooling list: Scarb and optional Starknet foundry.
  • Installation: Simplify to scarb build workflow; add scarb --release build for release builds; mention installing deps (e.g., via asdf).

^{Written by Cursor Bugbot for commit 7fb9d7a. This will update automatically on new commits. Configure here.}

[arad-starkware]

• doc: update readme dependencies and installation sections #99 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.77%. Comparing base (c8d4f20) to head (7fb9d7a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #99   +/-   ##
=======================================
  Coverage   95.77%   95.77%           
=======================================
  Files          42       42           
  Lines       10102    10102           
=======================================
  Hits         9675     9675           
  Misses        427      427           

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[NirLevi-starkware]

@NirLevi-starkware reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @noa-starkware)

[arad-starkware]

Merge activity

• Dec 4, 10:35 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Dec 4, 10:35 AM UTC: @arad-starkware merged this pull request with Graphite.